In this lesson students learn the equation needed to calculate bone mineral density. This is a calculation that biomedical engineers make a lot. The student will be motivated to learn more about the use of logarithms.

Graph theory is a visual way to represent relationships between objects. For instance, a family tree is the simplest of these. Graph theory is the study of graphs in computer science and mathematics. Software engineers use graphs to represent communication networks, data organization, and graph theory to market products.

Students explore the concept of similar right triangles and how they apply to trigonometric ratios. Engineers use trigonometry in relating to objects and distances that they cannot directly measure.

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